Systems and methods for estimating tissue parameters using surgical devices
US10130412B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2014 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Jun 5, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/162
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Systems and methods for estimating tissue parameters, including mass of tissue to be treated and a thermal resistance scale factor between the tissue and an electrode of an energy delivery device, are disclosed. The method includes sensing tissue temperatures, estimating a mass of the tissue and a thermal resistance scale factor between the tissue and an electrode, and controlling an electrosurgical generator based on the estimated mass and the estimated thermal resistance scale factor. The method may be performed iteratively and non-iteratively. The iterative method may employ a gradient descent algorithm that iteratively adds a derivative step to the estimates of the mass and thermal resistance scale factor until a condition is met. The non-iterative method includes selecting maximum and minimum temperature differences and estimating the mass and the thermal resistance scale factor based on a predetermined reduction point from the maximum temperature difference to the minimum temperature difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.